Magnetostrictive stress wave sensor

A shock sensor has a housing with a Terfenol-D type sensing element positioned inside a sensing coil. A permanent biasing magnet is positioned in engagement with the Terfenol-D sensing element, and a spacer engages the Terfenol-D sensing element and extends from the housing. The housing has a beam w...

Ausführliche Beschreibung

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Bibliographische Detailangaben
1. Verfasser:	STUVE STEVEN R
Format:	Patent
Sprache:	eng
Schlagworte:	BASIC ELECTRIC ELEMENTS ELECTRICITY INDICATING PRESENCE, ABSENCE, OR DIRECTION, OF MOVEMENT INDUCTANCES INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES MAGNETS MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC ORINFRASONIC WAVES MEASURING MEASURING LINEAR OR ANGULAR SPEED, ACCELERATION, DECELERATION,OR SHOCK PHYSICS SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES TESTING TRANSFORMERS
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Beschreibung
Zusammenfassung:	A shock sensor has a housing with a Terfenol-D type sensing element positioned inside a sensing coil. A permanent biasing magnet is positioned in engagement with the Terfenol-D sensing element, and a spacer engages the Terfenol-D sensing element and extends from the housing. The housing has a beam with one or two mounting holes through which fasteners extend to mount the shock sensor to a structural member. The housing places the spacer in compression against the structural member. In an alternative embodiment a DC current can be supplied to the sensing coil to provide the biasing magnetic field. A high frequency filter separates the shock sensing signal from the applied DC biasing current.